Answer: I think the answer is 1
i just learned this about two weeks ago
Explanation:
Technically there is only one phase unless you account for a solution where you have a pure liquid with something dissolved in it. Unless you count aqueous as a phase which is just dissolved. Since you are in high school the answer you are looking for is one. <span />
Answer:
The ref blood cells are shaped like sickles or crescent moons, sticky cells can get stuck in small blood vessels which can slow or block blood flow and oxygen to parts of the body
You could let the air out of the balloon while it is under the water with a container filled with water upside down over it. And measure the water displacement.